It would definitely make sense for them to be so busy between their respective duties that they never had a chance for a proper, not work-related conversation, I think. And after seeing the way he and Jade worked together in the Ultima battle, there's really no way she can feign ignorance about their closeness.

As for her opinion on Downapolis, she's definitely of the mindset that it should be investigated further and they should do something about it, especially with what little information they have.

I can't remember if it was made public that they were partly responsible for what happened to the other set of Heroes, so feel free to correct me if I'm wrong, but if it is then she definitely has a personal grudge against them. Two of her castmates were crystallised, and another outright died who also happened to be her previous not!boyfriend, so there's that factor.